Music sheets



{No Model.) 2 SheetsSheet l.

H. NOTHHAAS.

DEVICE FOR TURNING MUSIC SHEETS.

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No. 451,976. Patented May 12,1891.

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UNITED STATES PATENT OFFICE.

HUGO NOTHHAAS, OF MUNICH, GERMANY.

DEVICE FOR TURNING MUSIC-SHEETS.

SPECIFICATION forming part of Letters Patent N 0. 451,976, dated May 12, 1891.

Application filed November 1 8, l8 9 0.

T0 (ZZZ whom it may concern.-

Be it known that I, Hueo NOTHHAAS, asubject of the Emperor of Germany, residing at Munich, in the Empire of Germany, have invented a new and useful Device for Turning Music Sheets, of which the following is a specification.

This invention relates to a music-sheet reverser in which, by a suitable number of superposed short levers, which are placed singly each under one sheet of the music-book prior to using the reverser, the music-sheet to be turned is so far lifted by its respective lever as to allow a rack-bar to move below the sheet, and by its forward movement shift on and turn the same over.

In the annexed drawings, Figure 1 is a vertical and longitudinal section, Fig. 2 a vertical cross-section, and Fig. 3 a horizontal and longitudinal section, of the device.

Over a pulley I), mounted on the same sha ft a with a toothed wheel f, a cord 0 is guided, which for every turning of a music-sheet is pulled by means of a'pedal. (Not shown in the drawings.) The other end of said cord 0 is connected with a plate d, adapted to compress, when the cord 0 is being pulled a spiral spring 6 inclosed in a box. By the frictional action of the cord 0 the pulley b is turned, whereby also the toothed wheel f is revolved, which gears into another toothed wheel g provided underneath. The shaft h of the latter carries, moreover, a partially-toothed wheel 7;, which is geared with a horizontally-guided toothed bar Z and a large toothed wheel 2', which gears into the rack-bar m. This rackbar m consists of single links hinged at the upper rim, so that it can only be bent upward but not downward beyond its straightened position.

Levers n are secured on a common upright shaft 0, and are subject to the pressure of a spiral spring 0 surrounding the upper portion of the latter and pressing the levers n against arib or projection 0', provided 011 said shaft 0. Each lever 97. has a second shorter arm n, and a recess n, corresponding to the rib 0, mentioned above.

By pulling the cord 0 through the pedal the partially-toothed wheel 70 causes the rack-bar Serial No. 371,884. (No model.)

Z gearing therewith to be displaced and to strike against the shorter arm n of the lever 01., which is pressed onto the rib or projection 0' and lies under the sheet to be turned of the music-book B. Thereby the lever 72 is turned about the upright shaft 0 and so far lifts the sheet to be reversed with its longer angular arm as to allow the linked rack-bar m, which has been meanwhile sufficiently advanced, to place itself under the sheet. Said levern, as soon as it is so far turned that its recess a coincides with the rib 0, is shifted down along the latter by the act-i011 of the spiral spring 0 surrounding the upright shaft 0, and descends by its own weight onto a collar 0 at the bottom of the shaft 0. By further pulling of the cord 0 the linked rack-bar m is m ore advanced, thereby completely reversing the music-sheet, while the partially-toothed wheel 70 ceases to gear into its toothed bar Z.

When the pedal-pressure on the cord 0 is discontinued, all toothed wheels move back by the action of the spiral spring e, inclosed in a box cZ. The linked rack-barmis thus shifted back and against suitably-placed curved surfaces A, so that its rear portion is bent into the shape of a loop and lodges itself in a casing. As soon as the partially-toothed wheel 70 again engages with its toothed bar Z and shifts the same somewhatback the following reversing-levern, lying under the next musicsheet, is pressed by the spiral spring 0 against the rib and can consequently be struck by the toothed bar Z, gearing with the partiallytoothed wheel 7c, when the cord 0 is again pulled.

What I claim is- In a device for turning music-sheets, the combination of the levers n, placed between the single sheets and turning round a common shaft 0, with the toothed bar Z, engaging into the partially-toothed wheel 7t and the flexible rack-bar m, the toothed wheels "Z f g, the pulley Z), the spring 6, and the cord c,connected with plate d, all as described.

HUGO NOTHHAAS. Witnesses:

EMIL HENZEL, LERUND FREUND. 

